Gail:
Yes, you are receiving the warning because the new fiscal year is not open yet in the GL.
No, you don't have to set up the new year in the GL to enter AP transactions (just respond "Yes" to the question). However if you want to get rid of the warning, set up the new year.
To set up the new fiscal year:
-Go to the GL
-Select Maintenance from the top menu bar
-Then select "Create next fiscal year"
-If you use Budgets and you want to start with blank budgets, put a check-mark on "Clear budget amounts"
-Click on the "Proceed" button.